期刊
INORGANIC CHEMISTRY FRONTIERS
卷 5, 期 11, 页码 2829-2835出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8qi00761f
关键词
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资金
- Program for Changjiang Scholars and Innovative Research Team in University of the Chinese Ministry of Education [IRT_15R52]
- Chinese Central Government
- Chinese Ministry of Education
- Clare Hall Life Membership at the Clare Hall College
- Department of Chemistry, University of Cambridge
- Major programs of technical innovation in Hubei [2018AAA012]
- Hubei Provincial Natural Science Foundation [2018CFA054]
- Shanghai Rising-Star Program [18QB1404500]
- [NSFC-21671155]
- [NSFC-U1663225]
By employing carbon-packed zeolite nanocrystals as primary building blocks, hierarchically porous MFI-type zeolites with precise dimensions spanning meso- and micro-length scales were successfully synthesized using an in situ crystallization strategy. The generalized Murray's law was firstly used to theoretically investigate the advantage of the porous hierarchy of the zeolites. The porosity distribution and coordination in the resultant zeolite crystals were found to be basically following the generalized Murray's law. Probing using the catalytic cracking reaction of isopropyl benzene revealed that as-prepared HierZSM-5 exhibited much higher conversion (approximate to 74.5%), compared with nanoZSM-5 (approximate to 30%) and bulky ZSM-5 (approximate to 28.6%). The outstanding catalytic performance was ascribed to the highly enhanced mass transfer of the Murray zeolite material in the heterogeneous catalytic reaction. Such a hierarchical single zeolite structure, designed by adopting the generalized Murray's law, can improve the thermal/hydrothermal stability of nanozeolites, and offer an alternative option for a long-term stable catalyst.
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